123561204 has 48 divisors (see below), whose sum is σ = 318893568. Its totient is φ = 36989568.

The previous prime is 123561197. The next prime is 123561209. The reversal of 123561204 is 402165321.

It is a super-2 number, since 2×123561204² = 30534742267859232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123561209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4932 + ... + 16475.

It is an arithmetic number, because the mean of its divisors is an integer number (6643616).

Almost surely, 2^123561204 is an apocalyptic number.

It is an amenable number.

123561204 is an abundant number, since it is smaller than the sum of its proper divisors (195332364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123561204 is a wasteful number, since it uses less digits than its factorization.

123561204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21464 (or 21462 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 123561204 is about 11115.8087425072. The cubic root of 123561204 is about 498.0741974252.

The spelling of 123561204 in words is "one hundred twenty-three million, five hundred sixty-one thousand, two hundred four".